#box{
	width: 343px;
	height: 480px;
	margin: 50px auto 0;
	position: relative;
	background:url(img/bg.jpg);
	user-select: none;
	overflow: hidden;
}
#scoreBoard{
	width: 100%;
	text-align: center;
	position: absolute;
	top: 30px;
}
#title{
	position: absolute;
	margin: 0 auto;
	left: 0;
	right: 0;
	top: 100px;
	width: 300px;
	height: 50px;
	animation: title 3s linear infinite;
}
@keyframes title{
	from{transform: translateY(0);}
	50%{transform: translateY(40px);}
	to{transform: translateY(0);}
}
#title>div{
	position: absolute;
	right: 20px;
	top: 30px;
	background:url(img/bird1.png)no-repeat;
}
#title>div>img{
	animation: bird .5s linear infinite;
}
@keyframes bird{
	from{opacity: 1}
	to{opacity: 0}
}
#start{
	position: absolute;
	left: 130px;
	top: 320px;
}
#slide{
	width: 999px;
	position: absolute;
	top: 422px;
	display: flex;
	animation: slide 5s linear infinite
}
@keyframes slide{
	from{left:0;}
	to{left:-343px;}
}
#flyBird{
	position: absolute;
	top: 200px;
	left: 20px;
	display: none;
	width: 40px;
	height: 30px;
}
ul{
	position: absolute;
	top: 0;
	left: 0;
	width: 100%;
	height: 422px;
	list-style: none;
	padding: 0;
	margin: 0;
}
ul>li{
	position: absolute;
	left: 500px;
	height: 100%;
	width: 62px;
	padding: 0;
	margin: 0;

}
.pipeTop{
	position: absolute;
	background: url(img/up_mod.png);
	width: 100%;

}
.pipeTop>img{
	position: absolute;
	bottom: 0;
}
.pipeBottom{
	position: absolute;
	bottom: 0;
	width: 100%;
	background: url(img/down_mod.png);
}